CN102568911A - Device for operating electrical switch - Google Patents

Abstract

The invention relates to a device (1) for operating an electric switch (2) having main contacts which are opened and closed by means of a driven shaft (8), said device (1) having a drive shaft (7) and at least one first and at least one second auxiliary switch (11, 12), said drive shaft extending perpendicularly to the driven shaft and rotatable from an open position (0) to a closed position (I) or Conversely, the rotation of the drive shaft drives the driven shaft to rotate from the open switch position to the closed switch position or vice versa, and at the same time, the switching state of the first auxiliary switch (11) shows that the driven shaft is in two switch positions at that time Which one of them, and at this time, the disconnection of the second auxiliary switch (12) is realized through the driven shaft before the main contact is disconnected in terms of time. In order to ensure that the switching state of the main contacts is displayed exactly each time, it is proposed that the output shaft actuates the first auxiliary switch and the drive shaft actuates the second auxiliary switch.

Description

device for operating electric switches

technical field

The invention relates to a device for actuating an electric switch having main contacts which are opened and closed by means of a driven shaft, said device having a drive shaft and at least one first and at least one second auxiliary switch, the drive shaft extending perpendicular to the driven shaft and rotatable from an open position to a closed position or vice versa, wherein rotation of the drive shaft drives the driven shaft from an open switch position to a closed switch position Movement or vice versa, at the same time, the switching state of the first auxiliary switch shows which of the two switching positions the slave shaft is at that time, and the opening of the second auxiliary switch at this time, in terms of time, after the main contact is This is done via the driven shaft before disconnection.

Background technique

It is known that the load isolating switch is a special structural form of the electric switch. It has contact-like main contacts which are opened and closed by means of a switching shaft, wherein the switching shaft has two switching positions. To close and open the switch, the switch shaft is turned each time from one switching position to the other, ie from the AUS (open) switching position to the EIN (closed) switching position and vice versa. The rotation of the switch shaft is accomplished by means of an operating device mounted on the switch, the driven shaft of which is connected to the switch shaft. To rotate the driven shaft, a drive shaft is provided which extends perpendicularly to the driven shaft and rotates corresponding to the two switching positions of the switching shaft from the open position to the closed position and usually in the opposite direction via a momentary switching mechanism. To actuate the drive shaft, a handle is plugged onto the drive shaft.

It is known to provide auxiliary switches in the actuating device, one of which always indicates the switching position of the switch shaft, and the other auxiliary switch is connected in such a way that it opens ahead of the main contact in time, so that when required Other safety devices can also be triggered. If the opening process of the main contact takes place within, for example, 20 milliseconds, then the temporally leading auxiliary switch opens at least 20 milliseconds earlier.

Typically, the auxiliary switch is operated via a drive shaft. In this case, however, mismanagement can occur. It can occur, for example, that the drive shaft becomes stuck behind the dead center of the momentary switching mechanism and thus cannot assume the required position in order to accurately indicate the changed state of the main contacts.

Contents of the invention

The technical problem to be solved by the present invention is to accurately display the switching state of the main contact all the time.

The technical problem is solved by a device for actuating an electrical switch having main contacts; the main contacts are opened and closed by means of a driven shaft, the device having a drive shaft and at least one first and at least one second auxiliary switch, the drive shaft extending perpendicular to the driven shaft and rotatable from an open position to a closed position or vice versa, wherein rotation of the drive shaft drives the driven shaft from an open switch position to a closed switch position Movement or vice versa, at the same time, the switching state of the first auxiliary switch shows which of the two switching positions the slave shaft is at that time, and the opening of the second auxiliary switch at this time, in terms of time, after the main contact is Before the disconnection takes place via the output shaft, according to the invention the output shaft actuates the first auxiliary switch and the drive shaft actuates the second auxiliary switch.

The subject matter of the invention is therefore that the actuations of the switches are mechanically decoupled from each other.

A technically simple embodiment provides that the output shaft has an output shaft cam, which pushes the first displacement part for actuating the (first) auxiliary switch, and that the drive shaft also has The (first) drive shaft boss that pushes the other (second) moving member in order to operate the other (second) auxiliary switch and that the angular position of the two bosses ( The angular displacement relative to the reference angle) is selected in each case such that the displacement of the movable part takes place staggered in time (ie sequentially).

In the simplest case, the cam of the first drive shaft pushes the second mobile part over the control curve.

A test (TEST) position can advantageously be provided opposite the closed position, wherein the drive shaft has a second (drive shaft) boss which, when the drive shaft turns, displaces both The part is simultaneously moved into the test position, always controlled by the control surface. The test position is opposite the closed position, ie, before the open position as seen in the direction of the closed position.

In a technically simple embodiment, the second drive shaft cam is arranged opposite the first drive shaft cam.

In particular, in order to additionally realize the test position with little effort, it is proposed that the control curve can directly push the second mobile part, which in each case entrains the first mobile part.

Description of drawings

Next, the present invention will be described in detail according to the accompanying drawings. In the attached picture:

Figure 1 shows the operating device and isolating switch before assembly,

FIG. 2 shows a plan view of the actuating device according to FIG. 1 ,

FIG. 3 shows a perspective view of the operating device according to FIG. 2 with the housing removed,

FIG. 4 shows a side view of the actuating device according to FIG. 3 ,

FIG. 5 shows a front view of the actuating device according to FIG. 3 ,

Figure 6 shows a front view of the operating device with the drive shaft between the open position and the closed position,

FIG. 7 shows a three-dimensional view of the operating device according to FIG. 6 ,

FIG. 8 shows a side view of the actuating device according to FIG. 6 ,

Figure 9 shows the manipulator with the drive shaft in the closed position,

FIG. 10 shows a three-dimensional view of the operating device according to FIG. 9 ,

Figure 11 shows a top view of the manipulator with the drive shaft in the test position, and

Figure 12 shows a front view of the manipulator with the drive shaft in the test position.

Detailed ways

FIG. 1 shows a device 1 for actuating a switch disconnector 2 before assembly, wherein the switch disconnector 2 (here of single-pole design) is fastened to the side of the actuating device 1 . The switch disconnector 2 has main contacts, not shown, which can be opened and closed by means of a switch shaft 3 . The disconnector 2 can be connected to the current circuit to be controlled via the connections 4 , 5 .

The actuating device 1 is located in a housing 6 , from which the free ends of the drive shaft 7 and the output shaft 8 protrude.

During assembly, the driven shaft 8 and the switch shaft 3 are connected to each other by being plugged together. For this purpose, a corresponding groove (not shown) is formed in the driven shaft 8 .

The drive shaft has a square groove 9 into which a corresponding handle can be inserted. The drive shaft 8 is rotated from the open position 0, as shown in FIG. Before opening position I, test position T is also laid.

FIG. 2 shows a front view of the actuating device 1 , and FIG. 3 shows a perspective view with the housing 6 removed. The drive shaft 7 and the driven shaft 8 extend perpendicularly to each other. The two shafts 7, 8 are interconnected (here indirectly via a momentary switch mechanism not otherwise shown), wherein the rotation of the drive shaft from its open position to its closed position indirectly causes the driven shaft to move from its Rotation of the open position to its closed position or vice versa. And after crossing the dead center of momentary switch mechanism, the closing process of driven shaft 8 just begins.

Furthermore, the auxiliary switches 11 , 12 in FIG. 3 have electrical contacts 13 . These electrical contacts 13 are actuated via control push rods 14 , 15 . When operating, the push rods 14, 15 are pressed into the auxiliary switches 11, 12 by the plate-shaped operating members 16, 17 arranged side by side; in Fig. The pieces 16, 17 are at the same height. The driven shaft 8 is in its disconnected position.

FIG. 4 shows a side view of the actuating device according to FIG. 3 . A cam-shaped elevation on the driven shaft 8 can be seen, which forms the (first) control curve 21 and cooperates with the projection 22 a of the (first) displacement part 22 . In FIG. 4, the control curved surface 21 abuts against said protruding portion 22a.

FIG. 5 shows a front view of the operating device 1 according to FIG. 3 . The drive shaft 7 has two (drive shaft) cams 18 , 19 , of which the cam 18 rests against the (left) side of the (second) control camber 20 .

In FIG. 6 , the drive shaft 7 is rotated clockwise so that the boss 19 is only against the other (right) side of the control curve 20 (the drive shaft 7 is between its open and closed positions). During rotation of the drive shaft 7 into this intermediate position, the control camber 21 pushes (pushes) the projection 22 a downwards against the spring force and thereby pushes (pushes) the moving part 22 . In this intermediate position, the two push rods 15 are pressed by the displacement part 22 (by means of the actuating part 17 arranged thereon), ie actuated into the auxiliary switch 12 . The mobile member 23 is in its initial state. In this way, the push rod 14 is kept from being actuated by the actuating element 16 . The auxiliary switch 11 is in its output (switching) state. The latter can be seen in the three-dimensional view in FIG. 7 and in the side view in FIG. 8 . Comparing FIGS. 4 and 8 , it can be seen that the movement of the moving member 22 through the control curved surface 21 is implemented. Said control camber 21 presses the mobile part 22 as well as the plate 17 downwards during the rotation and holds them in this position against the elastic spring force.

In FIG. 9 the drive shaft 7 is in its closed position (end position) and the highest point of the cam 19 is on the highest point of the control curve 20 . The control curve 20 is likewise connected to the displacement element 23 and is pressed downwards by the boss 19 . The moving part 23 (operating part 16 ) actuates the push rod 14 of the auxiliary switch 11 . This can also be seen clearly in Figure 10.

In Fig. 11, the drive shaft 7 is rotated to its test position before the open position, thus the test position is opposite to the closed position.

As can be seen from the associated FIG. 12 , the second cam 18 cooperates with the control curve 20 in the test position and presses the associated moving part 22 downwards, while it entrains the moving part 23 . In this position, the two auxiliary switches 11, 12 are actuated, while the main contacts remain open.

After the dead center of the momentary switch mechanism has been crossed at switch-on, the driven shaft 8 starts the closing operation. By means of the control camber 21 lying thereon, the mobile part 22 is pressed into its end position, but before (but at most simultaneously) the drive shaft 7 assumes its closed position I. With the end position of the movable part 22 the auxiliary switch 12 is closed. The drive shaft 7 drives the mobile part 23 via its cam 19 into its end position only shortly before reaching the closed position. The auxiliary switch 11 has only now been closed. In this way it is achieved that the auxiliary switch 11 closes later (or at most simultaneously) than the main contacts.

During the disconnection process, the driven shaft 7 (handle) first rotates counterclockwise to the disconnected position. The boss 19 is adjusted such that the mobile 22 is released and pressed (by means of a spring) into its initial position before reaching the dead point. The opening of the auxiliary switch 11 is realized. By loosely connecting the moving parts 22 , 23 , the moving part 22 is held in its end position until the dead center is crossed, and the driven shaft 8 thereby opens the main contact via the switching shaft 3 . Only then is the mobile part 22 released by the control camber 21 and pressed (via the spring) into its initial position. The other auxiliary switches 12 are turned off. The auxiliary switch is thus actuated in advance independently of the display value of the switch position.

Claims (6)

1. A device (1) for operating an electric switch (2) having main contacts which are opened and closed by means of a driven shaft (8), said device (1) having a drive Shaft (7) and at least one first and at least one second auxiliary switch (11, 12), said drive shaft (7) extending perpendicularly to the driven shaft (8) and movable from an open position (O) to a closed position (1) Rotate or vice versa, wherein the rotation of the drive shaft (7) drives the driven shaft (8) to move from the disconnected switch position to the closed switch position or vice versa, at the same time, the switching state of the first auxiliary switch (11), Shows which of the two switch positions the slave shaft (8) is in at the time, and at this moment the opening of the second auxiliary switch (12) is timed through the slave shaft ( 8) Implementation, characterized in that the driven shaft (8) actuates the first auxiliary switch (11) and the drive shaft actuates the second auxiliary switch (12). 2. The device according to claim 1, characterized in that the driven shaft (8) has a driven shaft cam (21) for actuating the first auxiliary switch (11) While pushing the first moving part (22), the drive shaft (7) has a first drive shaft boss (19), which pushes the second drive shaft boss (19) in order to manipulate the second auxiliary switch (12). mover (23), and the angular position of the driven shaft boss (21) on the driven shaft (8) and the first driving shaft boss (19) on the driving shaft (7) is chosen such that The movement of the moving parts (22, 23) takes place with a time offset. 3. The device according to claim 1 or 2, characterized in that the first drive shaft cam (19) pushes the second moving part (23) via the control curve (20). 4. The device according to any one of claims 1 to 3, characterized in that the open position (O) is provided with a test position (T) opposite the closed position (I), and the drive shaft (7 ) has a second drive shaft boss (18), and the second drive shaft boss (18) is controlled by the curved surface (20) when the drive shaft (7) rotates from the disconnected position (O) to the test position (T). ) control the two moving parts (22, 23) simultaneously. 5. The device according to claim 4, characterized in that the second drive shaft cam (18) is situated opposite the first drive shaft cam (19). 6. According to the described device of claim 4 or 5, it is characterized in that the second drive shaft boss (18) directly pushes the second moving part (23) through the control curved surface (20), and the second moving part ( 23) Drive the first moving part (22) every time.

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